I have posted some numbers and Dyno plot after the ECUTEK tuning. at normal load conditions the boost will peak at 26psi and immediately correct back to the 24psi set point. However at high load at (4th gear up a hill or 5th or 6th gear on highway) the boost goes up to about 29psi from 2700RPM and it is not just a peak, it actually stays there until the RPM builds up. The problem is that the car does not actually pull very hard in this condition as the ECU probably switches to the protection tables or the engine starts knocking. Is this due to the boost controller not coping or some other problem?

I used to have a Gizzmo IBC electronic boost controller but I did not like it because the boost was not stable. I am thinking of getting the Greddy/TRUST Profec B-Spec II Electronic Boost Controller. Is this going to fix the problem or does enyone have some experience with it?

 

I thought you dont need a MBC with the ecutek. The ecutek controls all of that doesnt it?

 

Ecutek has great boost control. Lose the EBC or MBC. Also dont believe the boost gauge, they are not always accurate.

 

The car is setup with factory boost controller.
I have looked at the hose fittings circuit to see if the plumbing was correct.
The Turbo pressure nipple is connected to the wastegate actuator through a T-junction. The bottom port of the T-junction is plumbed to the side ports of the solenoids (2 solenoids in parallel) and the centre port of the solenoids is vented to the turbo inlet pipe after the MAF.